203.100.224.0/19

AS1221 · Telstra Limited

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Summary

Country	Australia
Domain	telstra.net
ASN	AS1221
Registry	APNIC
ID	TELSTRAINTERNET-AU

WHOIS Details

inetnum:        203.100.224.0 - 203.100.255.255
netname:        TELSTRAINTERNET-AU
descr:          Telstra Limited
country:        AU
org:            ORG-TC6-AP
admin-c:        TIAR-AP
tech-c:         TAN2-AP
status:         ALLOCATED PORTABLE
abuse-c:        AT1005-AP
remarks:        -----
remarks:        All reports regarding SPAM or security breaches
remarks:        should be addressed to [email protected]
remarks:        ------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-AU-TIAR-AP
mnt-routes:     MAINT-AU-TIAR-AP
mnt-irt:        IRT-TELSTRA-AU
last-modified:  2024-05-10T00:50:23Z
source:         APNIC

irt:            IRT-TELSTRA-AU
address:        Telstra Internet
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        TIAR-AP
tech-c:         TIAR-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2026-01-26
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2026-01-26T01:19:20Z
source:         APNIC

organisation:   ORG-TC6-AP
org-name:       Telstra Limited
org-type:       LIR
country:        AU
address:        242 Exhibition Street
e-mail:         [email protected]
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2024-12-06T08:30:50Z
source:         APNIC

role:           ABUSE TELSTRAAU
country:        ZZ
address:        Telstra Internet
phone:          +000000000
e-mail:         [email protected]
admin-c:        TIAR-AP
tech-c:         TIAR-AP
nic-hdl:        AT1005-AP
remarks:        Generated from irt object IRT-TELSTRA-AU
remarks:        [email protected] was validated on 2026-01-26
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2026-01-26T01:19:29Z
source:         APNIC

role:           Telstra AU NOC
address:        Telstra Internet
address:        242 Exhibition Street
address:        Melbourne
address:        VIC 3000
country:        AU
phone:          +61 3 8650 3305
e-mail:         [email protected]
admin-c:        TIAR-AP
tech-c:         TIAR-AP
nic-hdl:        TAN2-AP
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2025-11-26T05:11:17Z
source:         APNIC

person:         Telstra Internet Address Registry
address:        Telstra Internet
address:        242 Exhibition St
address:        Melbourne
address:        VIC 3000
country:        AU
phone:          +61 000000000
e-mail:         [email protected]
nic-hdl:        TIAR-AP
remarks:        Telstra Internet Address Registry Role Object
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2021-12-09T22:28:56Z
source:         APNIC

route:          203.100.224.0/19
origin:         AS1221
descr:          Telstra Corporation 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2021-01-22T00:19:56Z
source:         APNIC

route:          203.100.224.0/19
origin:         AS19905
descr:          Telstra Corporation Limited 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2022-09-12T02:06:54Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.100.0.0/16

Range	ASN	Company	Num of IPs
203.100.160.0/19	AS17839	LG HelloVision Corp.	8,192
203.100.160.0/19	AS38091	LG HelloVision Corp.	8,192
203.100.208.0/20	AS9304	Brander Group Inc	4,096
203.100.208.0/20	AS18779	Brander Group Inc	4,096
203.100.192.0/20	AS23724	Beijing Zhonglianlixin Technology Co., Ltd.	4,096
203.100.208.0/20	AS35758	Brander Group Inc	4,096
203.100.208.0/20	AS11404	Brander Group Inc	4,096
203.100.92.0/22	AS23724	CloudVsp.Inc	1,024
203.100.61.0/24	AS45118	Australian Nursing Federation Industrial	256
203.100.57.0/24	AS149948	PT Atharva Telematika Persada	256
203.100.62.0/24	AS154275	Silver Fern Farms Limited	256
203.100.173.0/24	AS17839	HVBucheon	256
203.100.56.0/24	AS38905	ELLERSTON CAPITAL LIMITED	256
203.100.59.0/24	AS38911	Keystart	256

Hosted domains

There are 5 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.100.251.242	hottopic.com.au	1
203.100.229.170	uniquepl.biz	1
203.100.249.226	metaverifiedsupport.net	1
203.100.236.251	sinclair-rush.com.au	1
203.100.254.214	websilos.com.au	1

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
121.20.202.243	AS4837 CHINA UNICOM China169 Backbone	`13.12ms` from Beijing, CN
50.26.199.131	AS19108 Optimum	`13.07ms` from Dallas, US
72.16.30.3	AS7029 Windstream Communications LLC	`10.39ms` from Dallas, US
87.38.108.3	AS1213 ASIERA TECHNOLOGY SERVICES CLG	`1.65ms` from Dublin, IE
77.3.170.51	AS6805 Telefonica Germany GmbH & Co.OHG	`1.05ms` from Hamburg, DE
147.81.25.243	AS36149 Hawaiian Telcom Services Company, Inc.	`9.22ms` from Honolulu, US
108.240.147.211	AS7018 AT&T Enterprises, LLC	`2.41ms` from Houston, US
212.140.160.19	AS2856 British Telecommunications PLC	`0.91ms` from London, GB
81.101.125.179	AS5089 Virgin Media Limited	`4.04ms` from London, GB
194.85.99.3	AS209701 Sberbank-factoring Ltd.	`1.01ms` from Moscow, RU
23.36.41.51	AS16625 Akamai Technologies, Inc.	`0.14ms` from Osasco, BR
87.90.38.51	AS5410 Bouygues Telecom SA	`2.73ms` from Paris, FR
62.0.111.3	AS1680 Cellcom Fixed Line Communication L.P	`1.68ms` from Rosh Ha‘Ayin, IL
220.81.155.195	AS4766 Korea Telecom	`6.62ms` from Seoul, KR
80.170.224.67	AS1257 Tele2 Sverige AB	`0.63ms` from Stockholm, SE
60.117.59.35	AS17676 SoftBank Corp.	`2.97ms` from Tokyo, JP
126.51.94.195	AS17676 SoftBank Corp.	`2.96ms` from Tokyo, JP
96.255.161.179	AS701 Verizon Business	`2.44ms` from Ashburn, US
58.31.22.35	AS17429 BEIJING GEHUA CATV NETWORK CO.LTD	`9.81ms` from Beijing, CN
66.23.204.3	AS63018 Dedicated.com	`0.25ms` from Chicago, US
99.3.175.19	AS7018 AT&T Enterprises, LLC	`17.88ms` from Durham, US
91.246.145.179	AS6712 TVP Format Llc	`6.04ms` from Kyiv, UA
76.87.22.131	AS20001 Charter Communications Inc	`5.40ms` from Los Angeles, US
71.226.48.51	AS7922 Comcast Cable Communications, LLC	`12.20ms` from Los Angeles, US
83.44.91.3	AS3352 TELEFONICA DE ESPANA S.A.U.	`10.17ms` from Madrid, ES

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -m7 203.100.227.234

traceroute to 203.100.227.234 (203.100.227.234): 7 hops max, 52 byte packets

1 [AS15169] 142.251.244.117 269.942 ms

2 [AS15169] 192.178.97.90 270.451 ms

3 *

4 [AS1221] 203.50.11.176 274.526 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Zuerich, CH

On January 19th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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